JSP

If you want to choose to execute one of several blocks of code, you can use the switch statement: Grammar:Switch (n){Case 1:Execute code block 1BreakCase 2:Execute code block 2BreakDefaultIf n is not 1 or 2, then this code is executed}How it works:

the HTTP protocol was invented by Tim Berners-lee, known as the web's father. The HTTP protocol is completely text-based. Browsers interact through HTTP protocol and server, and the default is port 80. You can also explicitly indicate the port

Method One: Caching data in the Init () method of the Servlet After the application server initializes the servlet instance, it invokes the Init () method of the servlet before servicing the client request. In the lifecycle of a servlet, the init ()

Review the JSP script element and annotation section today, the case writes out, everybody oneself debugging, the overall summary is as follows,1, JSP declaration statement:A variable with a declaration statement is a global variable, and multiple

1.request Object This object encapsulates the information submitted by the user, and can obtain information submitted by the user by invoking the response of the object. when the request object gets the characters submitted by the user, it will

In JSP, we often read data from the database back to the client, but we often in the production of garbled phenomenon, so we can use this method to ensure the correct output of Chinese, Here's an example,Before we catch the value of the form or

Struts+ajax+jsp request to the background garbled problem can be in the AJAX request URL before the parameters to encodeURI () transcoding to solve, encounter a similar situation friends can refer to theThe parameter is encodeURI () transcoding

There are several workarounds:1, ensure that the character encoding of the project and each JSP page character encoding consistent, if inconsistent may lead to Chinese garbled problem 2, write the filter filter, in the filter method

Recently in the sonar scan of things, has been only scanning Java code, so that the statistics of the data escalation leader many developers do not obey (say I do not have to write JSP to write JS? )，So good, so continue to the whole sonar, in the

I. Expression tags Effect: 1. Evaluate the value of an expression 2. Display the value of an expression on the pageNote that: cannot have semicolons.Two. Declaring an expression Function: Declare variables and functions that can be called by Java

Because you want to use a Java Web project to connect using the Springboot framework, the Java Web Project uses JSP, so you need to introduce JSP support in spring bootIntroduction Method online A lot, and now record the problems you have

The constituent elements of JSP;1, instructionPage directiveLanguage---Current page language: JavaImport---The class library introduced by the current page, which is not introduced by defaultContentType---text/html; charset= ' character set 'Iso-8859

Custom Label Development Steps1) Write a generic Java class that inherits the Simpletagsupport class, called the tag processor class

Workaround:In Web. xml servlet> Servlet-name>DispatchServlet-name> Servlet-class>Org.springframework.web.servlet.DispatcherServletServlet-class> Load-on-startup>3Load-on-startup> servlet> servlet-mapping> Servlet-

Requirements: The system front-end JSP uses the Easyui DataGrid to show some task information, a status message in the task information that shows the value is a number,You need to display the status as descriptive information based on the mappings

In the JSP page. JavaScript is often used, but out of JavaScript gets the value stored in Request,session, application. For example, the following is the get value in Request:If the background is:Request.setattribute ("value", "123");In JavaScript

Premise: In our program is the pursuit of high cohesion, low coupling, but if we put the JSP page code and Java code is written in the JSP code, so that the Java and JSP high-coupling so that not only make the JSP code page is very complex, but also

Import= "Java.awt.*,java.awt.image.*,java.util.*,javax.imageio.*"%>Color Getrandcolor (intFcintBC) {//get random colors for a given rangeRandom random =NewRandom (); if(FC > 255) FC= 255; if(BC > 255) BC= 255; intr = FC + random.nextint (BC-FC);

1 Spring MVC Configuration -2 servlet>3 Servlet-name>SpringmvcServlet-name>4 Servlet-class>Org.springframework.web.servlet.DispatcherServletServlet-class>5 Init-param>6

1.2.3.4.5.JSP Window.onload,